It is not about TTL 1, no TTL decrement should happen for intra-subnet forwarding at all On top you need to modify the data-plane to achieve this, since it now needs to find out if it is intra or inter subnet where current PE(s) don’t have to do this.
On 25/11/13 07:22, "Xuxiaohu" <[email protected]> wrote: >Wim, > >It said clearly "if the source and destination addresses of a packet >whose TTL is set to 1 belong to the same extended subnet, both ingress >and egress PE routers MUST NOT decrement the TTL of such packet." Did you >doubt that the PE routers could know whether the source and destination >address belong to the same extended subnet? > >Xiaohu > >> -----邮件原件----- >> 发件人: Henderickx, Wim (Wim) [mailto:[email protected]] >> 发送时间: 2013年11月25日 14:08 >> 收件人: Xuxiaohu; [email protected] >> 抄送: [email protected] >> 主题: Re: New Version Notification for >>draft-xu-l3vpn-virtual-subnet-02.txt >> >> On the TTL issue I believe this is not addressing the issue. We can say >>don’t >> decrement but when and how will the PE(s) do or don’t. >> >> On 25/11/13 03:22, "Xuxiaohu" <[email protected]> wrote: >> >> >Hi all, >> > >> >Major changes since the -01 version include: >> > >> >1) add a section about TTL consideration; >> >2) remove the section of PE Router FIB Reduction; >> >3) remove the section of PE Router RIB Reduction; >> > >> >Any further comments are welcome. BTW, the removed sections as >> >mentioned above would be described in separate docs. >> > >> >Best regards, >> >Xiaohu >> > >> >> -----邮件原件----- >> >> 发件人: [email protected] [mailto:[email protected]] >> >> 发送时间: 2013年11月25日 10:10 >> >> 收件人: Brendan Fee; Susan Hares; Fan Yongbing; Xuxiaohu; Xuxiaohu; >> >>Christian Jacquenet; Truman Boyes; Yongbing Fan >> >> 主题: New Version Notification for draft-xu-l3vpn-virtual-subnet-02.txt >> >> >> >> >> >> A new version of I-D, draft-xu-l3vpn-virtual-subnet-02.txt >> >> has been successfully submitted by Xiaohu Xu and posted to the IETF >> >>repository. >> >> >> >> Filename: draft-xu-l3vpn-virtual-subnet >> >> Revision: 02 >> >> Title: Virtual Subnet: A L3VPN-based Subnet Extension Solution >> >> Creation date: 2013-11-25 >> >> Group: Individual Submission >> >> Number of pages: 13 >> >> URL: >> >> >>http://www.ietf.org/internet-drafts/draft-xu-l3vpn-virtual-subnet-02.txt >> >> Status: >> >>http://datatracker.ietf.org/doc/draft-xu-l3vpn-virtual-subnet >> >> Htmlized: >> >>http://tools.ietf.org/html/draft-xu-l3vpn-virtual-subnet-02 >> >> Diff: >> >> http://www.ietf.org/rfcdiff?url2=draft-xu-l3vpn-virtual-subnet-02 >> >> >> >> Abstract: >> >> This document describes a Layer3 Virtual Private Network (L3VPN)- >> >> based subnet extension solution referred to as Virtual Subnet, >>which >> >> can be used as a kind of Layer3 network virtualization overlay >> >> approach for data center interconnect. >> >> >> >> >> >> >> >> >> >> Please note that it may take a couple of minutes from the time of >> >>submission until the htmlized version and diff are available at >> >>tools.ietf.org. >> >> >> >> The IETF Secretariat >> > >
